Re:

Yes, lincoln logs. If a woman likes to play with legos, tinkertoys, or lincoln logs as an adult, then there's a good chance she's an engineer. And as Scott Adams noted, "...female engineers become irresistible at the age of consent and remain that way until about thirty minutes after their clinical death. Longer if it's a warm day."

The presence of these toys is correlated with the kinds of people I like to hang out with, and in my limited experience, these kinds of people tend to be disproportionately represented in the engineering professions. However, it's the playful attitude I like, regardless of the individual's particular profession. Playing with food is good too...:>